690961768 has 32 divisors (see below), whose sum is σ = 1545010560. Its totient is φ = 283250880.

The previous prime is 690961757. The next prime is 690961781. The reversal of 690961768 is 867169096.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 266943 + ... + 269518.

It is an arithmetic number, because the mean of its divisors is an integer number (48281580).

Almost surely, 2^690961768 is an apocalyptic number.

It is an amenable number.

690961768 is an abundant number, since it is smaller than the sum of its proper divisors (854048792).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

690961768 is a wasteful number, since it uses less digits than its factorization.

690961768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536497 (or 536493 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 52.

The square root of 690961768 is about 26286.1516392187. The cubic root of 690961768 is about 884.0659676548.

The spelling of 690961768 in words is "six hundred ninety million, nine hundred sixty-one thousand, seven hundred sixty-eight".